Thank you to all the patient people here who've answered my many questions. You'll be relieved to hear that Im done with my current Amazon quest. I want to preface this with the fact that Ive done very frequent business with Amazon for 12 years now, but have only returned fewer than 10 defective items in all this time":Current 2-week final tally:
Kindle Paperwhite  returned, defective
Kindle Paperwhite replacement  returned, defective
Paperwhite case  returned, no longer needed
Kindle Fire HD 7  returned, defective
Kindle Fire case  returned, no longer needed
Grantwood book light  returned, defective
Lighted case for Kindle 3  returned, not as bright as advertised
MightyBright travel booklight  kept
-----------------------------------------------Net result? One cheap booklight. Now Im waiting for a ton of refunds.

I don't know whether to laugh or cry -- my saga continues...

I had returned the Grantwood booklight, which is powered via the Kindle Keyboard contacts, because it crashed my KK, requiring a reset. The manufacturer contacted me to say that they would replace the light, but cautioned me that this cannot be the fault of the booklight -- rather, typically the fault of the Kindle contacts, requiring a replacement of the Kindle. I'm waiting for a replacement of the light, and am dreading how this is likely to work out. My KK warranty is up in a couple of weeks.